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<td ><a href="../qtdoc/index.html">Qt 5.12</a></td><td ><a href="qtquick-index.html">Qt Quick 模块</a></td><td ><a href="qtquick-qmlmodule.html">QML类型</a></td><td >DropArea QML 类型</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc">目录</a></h3>
<ul>
<li class="level1"><a href="#properties">属性</a></li>
<li class="level1"><a href="#signals">信号</a></li>
<li class="level1"><a href="#details">详细信息</a></li>
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<h1 class="title">DropArea QML 类型</h1>
<span class="subtitle"></span>
<!-- $$$DropArea-brief -->
<p>For specifying drag and drop handling in an area. <a href="#details">更多...</a></p>
<!-- @@@DropArea -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> 导入语句：</td><td class="memItemRight bottomAlign"> import QtQuick 2.12</td></tr></table></div><ul>
<li><a href="qml-qtquick-droparea-members.html">所有成员的列表，包括继承成员</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">属性</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#containsDrag-prop">containsDrag</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#drag-prop">drag</a></b></b><ul>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#drag.x-prop">drag.x</a></b></b> : qreal</li>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#drag.y-prop">drag.y</a></b></b> : qreal</li>
</ul>
</li>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#drag.source-prop">drag.source</a></b></b> : Object</li>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#keys-prop">keys</a></b></b> : stringlist</li>
</ul>
<a name="signals"></a>
<h2 id="signals">信号</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#dropped-signal">dropped</a></b></b>(DragEvent <i>drop</i>)</li>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#entered-signal">entered</a></b></b>(DragEvent <i>drag</i>)</li>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#exited-signal">exited</a></b></b>()</li>
<li class="fn"><b><b><a href="qml-qtquick-droparea.html#positionChanged-signal">positionChanged</a></b></b>(DragEvent <i>drag</i>)</li>
</ul>
<!-- $$$DropArea-description -->
<a name="details"></a>
<h2 id="details">详细信息</h2>
<p>A <a href="qml-qtquick-droparea.html">DropArea</a> is an invisible item which receives events when other items are dragged over it.</p>
<p>The <a href="qml-qtquick-drag.html">Drag</a> attached property can be used to notify the <a href="qml-qtquick-droparea.html">DropArea</a> when an Item is dragged over it.</p>
<p>The <a href="qml-qtquick-droparea.html#keys-prop">keys</a> property can be used to filter drag events which don't include a matching key.</p>
<p>The <a href="qml-qtquick-droparea.html#drag.source-prop">drag.source</a> property is communicated to the source of a drag event as the recipient of a drop on the drag target.</p>
<p><b>请参考 </b><a href="qtquick-draganddrop-example.html">Qt Quick 示例 - Drag 和 Drop</a> 和 <a href="qtquick-externaldraganddrop-example.html">Qt Quick 示例 - externaldraganddrop</a>。</p>
<!-- @@@DropArea -->
<h2>属性文档</h2>
<!-- $$$containsDrag -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="containsDrag-prop">
<td class="tblQmlPropNode"><p>
<a name="containsDrag-prop"></a><span class="name">containsDrag</span> : <span class="type"><a href="../qtqml/qml-bool.html">bool</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property identifies whether the <a href="qml-qtquick-droparea.html">DropArea</a> currently contains any dragged items.</p>
</div></div><!-- @@@containsDrag -->
<br/>
<!-- $$$drag -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="even" id="drag-prop"><th class="centerAlign"><p><a name="drag-prop"></a><b>drag group</b></p></th></tr><tr valign="top" class="odd" id="drag.x-prop"><td class="tblQmlPropNode"><p><a name="drag.x-prop"></a><span class="name">drag.x</span> : <span class="type">qreal</span></p></td></tr><tr valign="top" class="odd" id="drag.y-prop"><td class="tblQmlPropNode"><p><a name="drag.y-prop"></a><span class="name">drag.y</span> : <span class="type">qreal</span></p></td></tr></table></div></div><div class="qmldoc"><p>These properties hold the coordinates of the last drag event.</p>
</div></div><!-- @@@drag -->
<br/>
<!-- $$$drag.source -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="drag.source-prop">
<td class="tblQmlPropNode"><p>
<a name="drag.source-prop"></a><span class="name">drag.source</span> : <span class="type">Object</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the source of a drag.</p>
</div></div><!-- @@@drag.source -->
<br/>
<!-- $$$keys -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="keys-prop">
<td class="tblQmlPropNode"><p>
<a name="keys-prop"></a><span class="name">keys</span> : <span class="type">stringlist</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds a list of drag keys a <a href="qml-qtquick-droparea.html">DropArea</a> will accept.</p>
<p>If no keys are listed the <a href="qml-qtquick-droparea.html">DropArea</a> will accept events from any drag source, otherwise the drag source must have at least one compatible key.</p>
<p><b>请参考 </b><a href="qml-qtquick-drag.html#keys-attached-prop">QtQuick::Drag::keys</a>。</p>
</div></div><!-- @@@keys -->
<br/>
<h2>Signal Documentation</h2>
<!-- $$$dropped -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="dropped-signal">
<td class="tblQmlFuncNode"><p>
<a name="dropped-signal"></a><span class="name">dropped</span>(<span class="type"><a href="qml-qtquick-dragevent.html">DragEvent</a></span> <i>drop</i>)</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This signal is emitted when a drop event occurs within the bounds of a <a href="qml-qtquick-droparea.html">DropArea</a>.</p>
<p>The corresponding handler is <code>onDropped</code>.</p>
</div></div><!-- @@@dropped -->
<br/>
<!-- $$$entered -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="entered-signal">
<td class="tblQmlFuncNode"><p>
<a name="entered-signal"></a><span class="name">entered</span>(<span class="type"><a href="qml-qtquick-dragevent.html">DragEvent</a></span> <i>drag</i>)</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This signal is emitted when a <i>drag</i> enters the bounds of a <a href="qml-qtquick-droparea.html">DropArea</a>.</p>
<p>The corresponding handler is <code>onEntered</code>.</p>
</div></div><!-- @@@entered -->
<br/>
<!-- $$$exited -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="exited-signal">
<td class="tblQmlFuncNode"><p>
<a name="exited-signal"></a><span class="name">exited</span>()</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This signal is emitted when a drag exits the bounds of a <a href="qml-qtquick-droparea.html">DropArea</a>.</p>
<p>The corresponding handler is <code>onExited</code>.</p>
</div></div><!-- @@@exited -->
<br/>
<!-- $$$positionChanged -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="positionChanged-signal">
<td class="tblQmlFuncNode"><p>
<a name="positionChanged-signal"></a><span class="name">positionChanged</span>(<span class="type"><a href="qml-qtquick-dragevent.html">DragEvent</a></span> <i>drag</i>)</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This signal is emitted when the position of a drag has changed.</p>
<p>The corresponding handler is <code>onPositionChanged</code>.</p>
</div></div><!-- @@@positionChanged -->
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